EP1760453A1 - Systéme photoélectrique portable et système optique associé - Google Patents

Systéme photoélectrique portable et système optique associé Download PDF

Info

Publication number
EP1760453A1
EP1760453A1 EP05018942A EP05018942A EP1760453A1 EP 1760453 A1 EP1760453 A1 EP 1760453A1 EP 05018942 A EP05018942 A EP 05018942A EP 05018942 A EP05018942 A EP 05018942A EP 1760453 A1 EP1760453 A1 EP 1760453A1
Authority
EP
European Patent Office
Prior art keywords
measuring
illumination
light
window
measurement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05018942A
Other languages
German (de)
English (en)
Inventor
Loris De Vries
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
X Rite Switzerland GmbH
Original Assignee
Gretag Macbeth AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gretag Macbeth AG filed Critical Gretag Macbeth AG
Priority to EP05018942A priority Critical patent/EP1760453A1/fr
Priority to US11/512,541 priority patent/US7535569B2/en
Publication of EP1760453A1 publication Critical patent/EP1760453A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/272—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration for following a reaction, e.g. for determining photometrically a reaction rate (photometric cinetic analysis)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0235—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using means for replacing an element by another, for replacing a filter or a grating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0272—Handheld
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0289—Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/52—Measurement of colour; Colour measuring devices, e.g. colorimeters using colour charts
    • G01J3/524—Calibration of colorimeters

Definitions

  • the invention relates to an optical measuring unit for a measuring device for the photoelectric measurement of a test object according to the preamble of independent claim 1 and to a photoelectric hand-held measuring device equipped with such an optical measuring unit according to the preamble of independent claim 19.
  • the invention relates to an optical measuring unit for a color measuring device. Color densitometer, spectrophotometer or multifunction device for the quantitative detection of colors and such a device.
  • a hand-held measuring device is understood to mean a generally autonomous, portable measuring device, which is normally equipped with operating and display elements and is positioned by hand on or on the object to be measured. But also expressly included are those devices which are connected via a communication channel to an external device, e.g. can be connected to a computer and can exchange with this measurement and / or control data.
  • a hand-held measuring device according to the invention in a housing may also comprise only one optical measuring unit and one subsequent photoelectric converter device.
  • Known generic handheld measuring devices are e.g. the "SpectroEye” from Gretag-Macbeth AG, the “Vipdens 2000” from Viptronic, the “530 SpectroDensitometer” from X-Rite and the “SpectroDens” from Techkon.
  • Handheld instruments of the generic type are used for spectral and / or densitometric color measurement in a variety of applications such as packaging, newspaper, advertising, security, paint and coatings industries.
  • the measurable color palette ranges from classic CMYK inks to metallised, to highly pigmented ANIVA inks. These can be applied, for example, to substrates such as coated or uncoated paper and transparent or metallized films. The wide range of application and the sometimes harsh environmental conditions place very high demands on a device used for this purpose.
  • a compact, ergonomic and robust design is a basic requirement for a handheld instrument for industrial use.
  • the measuring result must be as independent as possible from the positioning of the measuring device, even for measuring objects with a finely structured surface.
  • the demand for ever smaller waste paper through the printing of color control panels is directly followed by a reduction in their dimensions.
  • the measuring device must therefore be able to be adapted to the color control field size to be measured by means of an exchangeable measuring diaphragm and positioned exactly thereon. Depending on the situation, a measurement without additional filters or with polarization, UV or D65 filters is required.
  • the incident illumination light is not uniformly diffused remit, so that the measurement result depends on the positioning of the measurement device on the measurement object.
  • positioning is meant the rotational position of the measuring device with respect to the normal to the measuring object at the measuring location.
  • This problem is often remedied by an all-round continuous or built from discrete light sources ring illumination. Due to the design, however, it is in the nature of an annular (45 ° / 0 °) illumination arrangement that the measuring point of the measurement object is completely covered during the measurement. If such a measuring arrangement is used in a measuring device, more or less expensive mechanisms are required in order to provide a clear view of the measuring object during positioning.
  • Some known devices are equipped with a folding mechanism.
  • the device housing In the idle state, in which the positioning of the device is carried out on the measurement object, the device housing is up against a foot plate, which has a sighting, folded up, so that the visor opening is visible.
  • the device housing folded down With the measuring head of the device is lowered onto the visor opening. It can happen that the device slips and thus the positioning is no longer correct.
  • these devices are mechanically relatively expensive due to the folding mechanism.
  • an optical measuring unit and a hand-held measuring device of the generic type are to be improved so that a high degree of positioning independence and without compromise in handling ergonomics ensure precise positioning on the object to be measured with the least possible constructive effort.
  • a relatively small range of the angle of incidence means in particular that the lower end of the incident angle range is greater than 35 °, in particular greater than 40 ° or 43 °, while the upper end is less than 55 °, in particular less than 50 ° or 47 ° is.
  • a relatively small Textpickwinkel Scheme means in particular that the angular range extends over less than 20 °, in particular less than 15 ° or 10 ° or less than 5 °.
  • the center of the Aufpickwinkel Anlagens is in particular in a range of -5 ° to + 10 °. in the In particular, 90 ° means that the offset angle is in a range with a lower limit of 80 ° or 85 ° or 88 ° and an upper limit of 100 ° or 95 ° or 92 °.
  • the illumination of the measurement object takes place from two mutually perpendicular spatial directions. This allows a particularly simple structural implementation of the optical measuring unit and still leads to sufficiently practical positioning independent measurement results, which are in most practical applications equal to those of a continuous or discrete ring illumination.
  • FIG. 1 The outer shape of the inventive, here designed for example as a spectrophotometer hand-held measuring device is shown in FIG. 1.
  • a hand-held measuring device all functional units and other organs and components are accommodated in the interior or on the surface of a housing G.
  • a display device D and control elements in the form of three buttons Sa-Sc and a slide button K can be seen.
  • a recess 1 is arranged, behind which there is a measuring space in the form of a measuring niche N shown here in the open state.
  • the measuring niche N can be opened and closed again by a movable wall part towards the outside of the housing.
  • the recess 1 opposite is located at the rear of the housing a not visible here interface connection for connection to an external device.
  • the interface IF is shown in FIG.
  • a bottom plate B At the bottom of the housing G is a bottom plate B, which is broken in the region of the niche N of a typically circular measuring window F.
  • the hand-held instrument To measure a test object, the hand-held instrument is placed on the measurement object with the measurement niche open in such a way that the measurement point to be measured is in the area of the measurement window F.
  • the handheld gauge is equipped with special visors, which will be discussed in more detail below.
  • FIG. 2 shows the hand-held measuring device without a housing, and from the block diagram of FIG. 3.
  • a further circuit board PCB2 is mounted, which carries the photoelectrical converter means PEC associated electronics and not shown electrical lines to the circuit board PCB or the processing and control electronics DCU located thereon is connected.
  • the illumination device IU contained in the optical measurement unit MU is designed to act on a measurement object MO through the measurement window F with illumination light IL.
  • the picking-up device PU which is likewise contained in the optical measuring unit MU, serves to collect the measuring light ML remitted by the measuring point MS of the measuring object MO through the measuring window F.
  • a light guide L supplies the collected measuring light ML to the spectrometer unit SU.
  • the general mode of operation of the hand-held measuring device is as follows:
  • the measuring unit MU impinges the measuring point MS of the measuring object MO with illumination light IL, intercepts the measuring light ML remitted by the measuring point MS and feeds it via the light guide L into the spectrometer unit SU.
  • the measurement light ML is decomposed into its spectral components by means of the spectrometer SM and converted into corresponding electrical (digital) measurement signals DMS by means of the photoelectric conversion device PEC.
  • These are fed to the processing and control electronics DCU and processed by this.
  • the measurement signals or measurement data derived therefrom are displayed by means of the display device D.
  • the measurement signals or measurement data calculated therefrom can be output to the interface IF. All measuring and processing operations are controlled by the DCU processing and control electronics, whereby the user can influence them via the Sa-Sc controls. Furthermore, data exchange or external control via the interface connection IF is possible in a manner known per se.
  • the hand-held measuring device corresponds in terms of construction and function to the state of the art, as given, for example, by the photoelectric hand-held measuring devices mentioned on the market.
  • the spectrometer unit SU with the associated photoelectric conversion device PEC, the processing and control electronics DCU, the display device D (LCD panel) and the interface connection IF are equal or formed analogously as in the known devices of this type.
  • the expert therefore needs so far no further explanation.
  • the decisive difference of the invention compared to the prior art consists in particular in the design of the inventive optical measuring unit MU and the arrangement of the measuring window F in an openable and lockable measuring chamber, which will be discussed in more detail below.
  • the optical measuring unit MU comprises the already mentioned base plate B, a cover plate 10 arranged parallel thereto at a distance above, fixed in the housing G and serving as a mounting plate, rotatably arranged between base plate B and cover plate 10, in FIG substantially cylindrical shell 20 having a cylindrical portion 21 and an inwardly projecting indentation 22 (or a flattening), a pair of illumination light sources in the form of light emitting diodes 31 a, 31 b, a pair of associated illumination optics in the form of illumination lenses 32 a, 32 b, a deflection prism 41, a Aufpickoptik in the form of Aufpicklinse 42, a Einkoppelungslinse 43, provided with a plurality of different sized apertures 44a, sliding aperture 44, a coaxially arranged inside the shell 20 to this and rotatably connected thereto window plate 50, a drive motor 60 with associated Drive belt 61 for d Envelope 20, the already mentioned, formed by
  • FIGS. 5-7 various parts of the optical measuring unit MU have been omitted in order to reveal the view of the parts lying behind or underneath and to more clearly recognize the structural details. For the same reasons, the mounting members for the different light sources and lenses are not shown.
  • the pivot bearing of the shell 20 can be seen from the sectional view of FIG. 8.
  • the motor 60 drives via the belt 61 to a pulley 23, which is rotatably supported via a short shaft 23a in a bushing 11 of the cover plate 10.
  • a hub 24 On the shaft 23a rotatably seated a hub 24 which carries the window plate 50 or part thereof.
  • a support tube 25 finally supports the hub 24 and thus the window plate 50 on the bottom plate B.
  • a first essential aspect of the invention consists in the special design of the measuring unit MU such that the illumination of the measurement object takes place obliquely from the interior of the housing G out of two mutually perpendicular spatial directions.
  • the illumination takes place through the interior of the jacket 20 and then through the measuring window F therethrough.
  • the usual or standardized for photoelectric instruments lighting geometries must be complied with.
  • the usual standardized illumination geometry provides an illumination angle range ⁇ of 45 ° +/- 5 ° (relative to the normal to the measurement object at the measurement location), in which case the Aufpickwinkel Scheme ⁇ , under which the remitted by the measurement object measurement light is collected, 0 ° +/- 5 ° (also referred to the normal to the target at the measuring location).
  • other illumination angle ranges are often used, e.g. 60 ° +/- 5 ° or 75 ° +/- 5 ° (relative to the normal to the measurement object at the measurement location), the Aufpickwinkel Scheme again 0 ° +/- 5 °.
  • Another advantageous picking angle range is e.g. 8 ° +/- 5 °. If additionally an additional light source with an illumination angle range of 8 ° +/- 5 ° is provided, 8 ° / 8 ° gloss measurements can also be carried out with such a measurement geometry.
  • the core point of the illumination geometry of the measuring unit MU is that a pair of light sources 31a, 31b and associated illumination lenses 32a, 32b are provided which illuminate the measurement object under the same illumination angle range ⁇ but from two mutually substantially perpendicular spatial directions ,
  • the light sources and illumination lenses are arranged so that the two illumination beam paths generated by them (at least in the vicinity of the measurement window F, ie when hitting the measurement object) relative to an axis Ax normal to the plane of the measurement window F by a displacement angle ⁇ of substantially 90 ° are offset from each other.
  • Fig. 9 illustrates this.
  • the (main axes of) the two illumination beam paths are denoted by ILa and ILb therein and their projections to the plane of the Measuring window F with ILa 'and ILb'.
  • the angle between the two projections gives the displacement angle ⁇ .
  • the illumination lenses 32a, 32b can also be omitted if the light sources 31a, 31b are arranged very close to the measurement object (measurement window F).
  • the lighting arrangement then consists of the light sources (e.g., transparent housing LEDs) and suitably shaped light exit apertures (apertures).
  • the window plate 50 is provided with at least one suitably dimensioned illumination window 51, through which the illumination light can pass.
  • a separate (smaller) illumination window is provided for each of the two illumination beam paths.
  • two or more pairs of illumination windows 51 are provided in the window plate 50 in the circumferential direction one behind the other and at least some of them are provided with filters for influencing the illumination light.
  • filters may e.g. Color, UV or polarizing filter.
  • the measuring light ML remitted by the measuring object is picked up by the picking device of the optical measuring unit MU in the exemplary embodiment shown at an angle of pickup range ⁇ of 0 ° +/- 5 ° (relative to the normal to the measuring window F).
  • a preferred alternative Aufpickwinkel Scheme is eg 8 ° +/- 5 °.
  • the Aufpick driving consists essentially of the deflection prism 41, the Aufpicklinse 42, the coupling lens 43 and the diaphragm 44.
  • the deflection prism 41 is located vertically above the measuring window F.
  • the remitted measurement light ML enters the interior of the shell 20 through Pick-up window 52 at the periphery of the window plate 50 via the deflection prism 41 to Aufpicklinse 42 and is coupled by means of the coupling lens 43 through the aperture 44 into the light guide L, which then feeds the Spektrometer knew SU.
  • the window plate 50 along its edge on two or more Aufpick donor 52, wherein the number and arrangement is matched to the number of illumination windows 51 and each one pair of illumination windows 51 is associated with a pick-up window 52.
  • the window plate 50 has no windows. Instead of the filters or in addition to the filters in the illumination windows 51, filters can also be arranged in the pick-up windows 52.
  • the window plate 50 may be omitted.
  • the jacket 20 would have to be e.g. be connected by spokes or the like. With the hub 23 or rotatably supported in other ways.
  • the panel 44 is part of a cranked slide 45, which carries at its upper end the already mentioned, protruding from the top of the housing slide button K and in the housing G in the direction of arrow 46 is manually back and forth adjustably mounted.
  • a cranked slide 45 By adjusting the slider 45, one of the different sized apertures 44a of the aperture 44 is introduced into the Aufpickstrahlengang between Einkoppelungslinse 43 and light guide L respectively.
  • the apertures 44a limit the size (diameter) of the measuring range (measuring spot) taken into account for the measurement on the test object. In this way, the meter can be easily adjusted to different measurement situations.
  • the two illumination light sources 31a and 31b can also be selectively switched on and off (via the processing and control electronics DCU). This allows the independent measurement of two mutually offset by 90 ° spatial directions and thereby the detection of any existing surface structuring of the DUT and possibly the initiation of appropriate measures.
  • Measurement n N trained measuring room the housing exterior on and lockable, here in the example shown as Measurement n N trained measuring room and the arrangement of the measuring window F in the area of this measuring room or this niche.
  • the measuring window F is freely visible to the user of the device when the measuring niche N is open, so that the hand-held measuring device can be simply and safely positioned on the measuring object so that the measuring point to be measured of the measuring object lies in the region of the measuring window comes.
  • the measuring niche N is then closed again to avoid extraneous light influences.
  • the opening and closing of the measuring niche N takes place by means of a movable wall part which, according to a further aspect of the invention, is formed by the cylindrical part 21 of the jacket 20 of the optical measuring unit MU.
  • a movable wall part which, according to a further aspect of the invention, is formed by the cylindrical part 21 of the jacket 20 of the optical measuring unit MU.
  • the jacket 20 is positioned in the housing, that its cylindrical portion 21, the recess 1 normally closes, in which case the measuring window F is within the shell 20.
  • the measuring niche N is in this case inside the shell 20 and is closed to the outside.
  • the indentation (or flattening) 22 of the jacket 20 is sized and shaped to lie within the measuring window F with respect to the housing G when the jacket 20 is turned to a position where the indentation is in the region of the recess 1 is located.
  • the measuring niche N is open to the outside in this case, but closed by the indentation 22 against the interior of the housing. This prevents the penetration of dust etc. into the housing interior.
  • Figures 1 and 4 show the jacket 20 in a rotational position in which the niche N is open to the outside. This rotational position of the jacket 20 is referred to below as the sighting position. All other rotational positions of the shell 20, in which the measuring niche N is closed to the outside, are referred to as measuring positions. One of these rotational positions is shown in Fig. 5.
  • the measuring space is completely inside or behind the front housing wall.
  • the measuring unit MU is arranged in the housing G, that the bottom plate B protrudes beyond the front housing wall, wherein the measuring space is then wholly or partially outside the front housing wall.
  • the jacket 20 likewise closes off the measuring space again in a dustproof and lightproof manner.
  • the measuring window F serves (in the sighting position of the jacket, that is to say when the measuring niche N is open) as a comparatively coarse sight for positioning the measuring device on the desired measuring point of the measuring object.
  • an additional sighting aid in the form of an optical sighting device is provided, which projects a sighting light mark VM (FIG. 10) through the measuring window F onto the measuring object which optically marks the exact position of the measuring range detected by the picking up device on the measuring object.
  • the optical sighting device can be designed to be arbitrary, for its realization, only a sighting light source and a suitable projection arrangement is required.
  • the Aufpick shark is used for the projection of the Visierlichtmarke, wherein the outgoing from the Viesierlichtario 71 sighting light is coupled via the coupling lens 73 and the light guide 72 in the reverse direction to the measuring beam in the light guide L and through the aperture 44th , the coupling lens 43 acting here as a coupling-out lens 43, the pick-up lens 42 acting here as a projection lens, and the deflection prism 41 within the measuring window F being directed onto the measurement object and generating there the sighting light mark.
  • the apertures 44a of the diaphragm 44 limit the size of the visor light mark exactly to the size of the then taken into account for the measurement range.
  • the diaphragm 44 thus forms common adjustable diaphragm means for the picking device and the optical sighting device.
  • the beam path of the sighting light between the deflection prism 41 and the measuring window F is shown in FIG. 10 and denoted by VL.
  • Another aspect of the invention relates to the physical white reference (white tile) 80.
  • This is, as already mentioned, arranged at the free end of the pivot arm 81, which in turn mounted directly on the bottom plate B slidably coaxial with the jacket 20 and slightly against by means of a spring 26 against the bottom plate is pressed.
  • the pivot arm 81 is pivoted in the manner of a trailing pointer by means of a driver, not shown, with so far until the white reference 80 located on it is exactly above the measuring window F. In this position, a white reference measurement can then be performed.
  • the pivot arm is not taken, so that the measurement window F remains free and the measurement of the measurement object can be done.
  • the hand-held measuring device is designed as a so-called gonio-measuring device, which allows the illumination of the measuring object under two or more different defined angles of incidence.
  • the optical measuring unit MU is equipped with one or more further pairs of illumination light sources and optionally associated illumination optics, which are designed and arranged analogously to the described pair of illumination light sources 31a, 31b bund illumination optics 32a, 32b, but the measurement object in the region of the measurement window F je Apply illumination light at a different angle of incidence. Typical angles of incidence are mentioned earlier.
  • two additional illumination light sources 131 bund 231b are located. Alternatively, only one single illumination light source can be provided for each of these additional illumination angle ranges.
  • an alternative embodiment of the measuring unit MU is shown schematically.
  • an aperture wheel 90 is provided, which is rotatably mounted in its plane about its axis 90a.
  • the aperture wheel protrudes laterally slightly out of the bottom plate B and preferably has a corrugated edge, so that it can be easily rotated manually.
  • the aperture wheel 90 is provided with a plurality of apertures 91-93 of different sizes, which take on the role of the measuring window F and at the same time limit the measuring range.
  • a physical white reference 94 is arranged in or on the aperture wheel 90. By rotating the aperture wheel 90, different sized measuring ranges can be defined or the white reference can be introduced into the measuring beam path.
  • the hand-held measuring device instead of the interface connection IF or in addition to this, it is also equipped with a wireless communication interface which increases handling convenience. Suitable wireless communication interfaces are well known and therefore need no further explanation.
  • the handheld measuring device has been explained using the example of a spectrophotometer. It is understood, however, that the invention is not limited to spectrophotometers. Rather, the hand-held device can also be formed classic color or density meter, in which case instead of the spectrometer SU a corresponding color measuring unit or density measuring unit would be present. Such color and density measuring units (essentially a combination of measuring filters and suitable photoelectric transducers) are well known and therefore need not be further explained by those skilled in the art.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP05018942A 2005-08-31 2005-08-31 Systéme photoélectrique portable et système optique associé Withdrawn EP1760453A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05018942A EP1760453A1 (fr) 2005-08-31 2005-08-31 Systéme photoélectrique portable et système optique associé
US11/512,541 US7535569B2 (en) 2005-08-31 2006-08-30 Optical measurement unit for a measurement device and a handheld photoelectric measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05018942A EP1760453A1 (fr) 2005-08-31 2005-08-31 Systéme photoélectrique portable et système optique associé

Publications (1)

Publication Number Publication Date
EP1760453A1 true EP1760453A1 (fr) 2007-03-07

Family

ID=36218707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05018942A Withdrawn EP1760453A1 (fr) 2005-08-31 2005-08-31 Systéme photoélectrique portable et système optique associé

Country Status (2)

Country Link
US (1) US7535569B2 (fr)
EP (1) EP1760453A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2270450B1 (fr) * 2009-06-24 2011-10-12 X-Rite Europe GmbH Dispositif portable de mesure de lumière
EP2728342A1 (fr) * 2012-11-06 2014-05-07 X-Rite Europe GmbH Appareil de mesure portatif destiné à saisir l'aspect visuel d'un objet de mesure
US10908312B2 (en) 2016-06-24 2021-02-02 Stanley Black & Decker Inc. Systems and methods for locating a metal object

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063586A (zh) * 2013-01-28 2013-04-24 苏州工业园区天势科技有限公司 一种印刷颜色差别装置
JP6196642B2 (ja) * 2015-05-11 2017-09-13 サカタインクスエンジニアリング株式会社 測色方法および自動測色装置
TWI592646B (zh) * 2015-12-23 2017-07-21 高準精密工業股份有限公司 光學裝置
US20190049306A1 (en) * 2017-08-10 2019-02-14 Westco Scientific Instruments, Inc Calibration for baking contrast units
KR102619436B1 (ko) * 2021-03-03 2024-01-03 (주)에이앤아이 기준광을 이용하여 위치를 조절하는 색도측정장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003660A (en) * 1975-12-03 1977-01-18 Hunter Associates Laboratory, Inc. Sensing head assembly for multi-color printing press on-line densitometer
US6031617A (en) * 1994-09-14 2000-02-29 X-Rite, Incorporated Scanning colorimeter with x-y drive
US20020167669A1 (en) * 2001-05-11 2002-11-14 Byk Gardner Gmbh Device and process for the determination of the properties of reflective bodies
US20030132982A1 (en) * 2001-05-22 2003-07-17 Xerox Corporation Color imager bar based spectrophotometer for color printer color control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168320A (en) * 1989-03-13 1992-12-01 Lutz Carl D Colorimeter
US5137364A (en) * 1991-01-31 1992-08-11 Mccarthy Cornelius J Optical spectral analysis apparatus
US5963333A (en) * 1996-09-12 1999-10-05 Color Savvy Systems Limited Color sensor
US6369895B1 (en) * 2000-02-16 2002-04-09 Electronics For Imaging, Inc. Color measurement instrument with asymmetric tapered sample area optical enclosure
EP1314972B1 (fr) * 2001-11-26 2010-07-14 X-Rite Europe GmbH Spectrophotomètre et son utilisation
WO2005106415A1 (fr) * 2004-04-30 2005-11-10 X-Rite, Incorporated Moteur colorimetrique a detecteurs paralleles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003660A (en) * 1975-12-03 1977-01-18 Hunter Associates Laboratory, Inc. Sensing head assembly for multi-color printing press on-line densitometer
US6031617A (en) * 1994-09-14 2000-02-29 X-Rite, Incorporated Scanning colorimeter with x-y drive
US20020167669A1 (en) * 2001-05-11 2002-11-14 Byk Gardner Gmbh Device and process for the determination of the properties of reflective bodies
US20030132982A1 (en) * 2001-05-22 2003-07-17 Xerox Corporation Color imager bar based spectrophotometer for color printer color control system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2270450B1 (fr) * 2009-06-24 2011-10-12 X-Rite Europe GmbH Dispositif portable de mesure de lumière
EP2728342A1 (fr) * 2012-11-06 2014-05-07 X-Rite Europe GmbH Appareil de mesure portatif destiné à saisir l'aspect visuel d'un objet de mesure
EP2728342B1 (fr) 2012-11-06 2015-06-10 X-Rite Switzerland GmbH Appareil de mesure portatif destiné à saisir l'aspect visuel d'un objet de mesure
EP2930494A1 (fr) * 2012-11-06 2015-10-14 X-Rite Switzerland GmbH Appareil de mesure portatif destiné à saisir l'aspect visuel d'un objet de mesure
US10126171B2 (en) 2012-11-06 2018-11-13 X-Rite Switzerland GmbH Hand-held measurement device for capturing the visual impression of a measurement object
US10908312B2 (en) 2016-06-24 2021-02-02 Stanley Black & Decker Inc. Systems and methods for locating a metal object
US11067714B2 (en) 2016-06-24 2021-07-20 Stanley Black & Decker Inc. Systems and methods for locating a metal object

Also Published As

Publication number Publication date
US20070046279A1 (en) 2007-03-01
US7535569B2 (en) 2009-05-19

Similar Documents

Publication Publication Date Title
EP2270450B1 (fr) Dispositif portable de mesure de lumière
EP1845350B1 (fr) Colorimètre manuel avec un boîtier comprenant deux parties mobiles l'une par rapport à l'autre, dans lesquelles se trouvent les composants passifs et l'unité de mesure opto-électronique
EP2505972B1 (fr) Colorimètre manuel
DE102007040839A1 (de) Optisches Untersuchungssystem mit einstellbarer Blende und Farbfilterbewertungsvorgang
DE69112691T2 (de) Abtastdensitometer.
DE4305968A1 (de) Handmeßgerät für Remissionsmessungen an farbigen Kontrollfeldern von Druckbogen
EP2703789B1 (fr) Colorimètre manuel
EP1760453A1 (fr) Systéme photoélectrique portable et système optique associé
DE102014215193A1 (de) Messanordnung zur Reflexionsmessung
DE3421577C2 (de) Gerät zur Reflexionsmessung an farbigen Objekten
EP0020971A1 (fr) Goniophotomètre pour la mesure de la brillance et/ou du voile de brillance de surfaces
DE69533802T2 (de) Abtastkolorimeter
DE102022128701A1 (de) Messvorrichtung für abgeschwächte totalreflexion, die zu einer raman-spektralmessung in der lage ist
EP3078950A1 (fr) Procédé de mesure de la couleur et colorimètre
DE112005000969T5 (de) Farbmessinstrument, das sowohl zum Streifenlesen als auch zum Punktlesen in der Lage ist
EP2975370B1 (fr) Colorimètre
EP0014375A2 (fr) Colorimètre à double faisceau à scintillement
DE19939154A1 (de) Verfahren und Meßvorrichtung zur Druckkontrolle und Bildanalyse
DE3723701A1 (de) Handmessgeraet zur optischen reflexionsmessung
DE112021005691T5 (de) Schreibgerät, lichtdetektionssystem und verfahren zur ermittlung eines lichtzustands
DE1497615A1 (de) Farbdicke- bzw. -dichte-Gleichheitspruefer
DE102008045987A1 (de) Vorrichtung zur Messung einer Spektralverteilung eines mit einer Druckeinrichtung hergestellten transluzenten Druckerzeugnisses
WO2020108967A1 (fr) Dispositif spectromètre et procédé correspondant pour faire fonctionner un dispositif spectromètre
DE202015006402U1 (de) Spektroskop, Bausatz zu dessen Herstellung und Kombination des Spektroskops mit einer Kameraeinrichtung
DE3843700A1 (de) Farbmessgeraet

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20070828

AKX Designation fees paid

Designated state(s): CH DE FR GB IT LI

17Q First examination report despatched

Effective date: 20081205

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100301